Andreas Castagneri was an important French violin maker born around 1696 (nobody knows for sure.) Very little is known about his life and work. It's a highly esoteric field after all. An encyclopedia of violin and bow makers is available from some publisher in New York. It sells for $595 plus shipping, in case you're interested. Castagneri built many violins like this one (circa 1740), though he is better known and appreciated for his cellos. Nowadays, his violins sell for between $5,000 and $25,000. Should you, or someone you know, find one in the attic, parting with it might be worth your while. This example is a little beat up - you can better see the scratches if you click on the photo. Castagneri died in 1747.